Thymidine → HCID 67703948, compound

HRID 1376456Notes

Reaction equation

HRID 1376456 reaction equation
[O:1]1[CH2:6][CH2:5][N:4]([C:7]2[N:15]=[CH:14][N:13]=[C:12]3[C:8]=2[N:9]=[CH:10][NH:11]3)[CH2:3][CH2:2]1.[F:16][C@@H:17]1[C@@H:21]([CH2:22][OH:23])[O:20][C@@H:19](N2C=CC(=O)NC2=O)[CH2:18]1.[N-]=[N+]=[N-].[K+].[C@@H]1(N2C=C(C)C(=O)NC2=O)O[C@H](CO)[C@@H](O)C1>P([O-])([O-])([O-])=O.[K+].[K+].[K+].CO>[F:16][C@@H:17]1[C@@H:21]([CH2:22][OH:23])[O:20][C@@H:19]([N:11]2[CH:10]=[N:9][C:8]3[C:12]2=[N:13][CH:14]=[N:15][C:7]=3[N:4]2[CH2:5][CH2:6][O:1][CH2:2][CH2:3]2)[CH2:18]1

Participants

7

Reactant 4

HCID 5789ThymidineHCID 1624502',3'-Dideoxy-3'-fluorouridineHCID 10290740Potassium azideHCID 178420899HCID 178420899, compound

Product 1

HCID 67703948HCID 67703948, compoundYield 51%

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 62657Potassium Phosphate, TribasicSolvent

Conditions

Temperature
45 °C

Procedure

6-Morpholino-9H-purine (0.50 g, 2.4 mmoles) and 2',3'-dideoxy-3'-fluorouridine (0.67 g, 2.9 mmoles) were suspended in 50 ml 10 mM potassium phosphate buffer, pH 7.0, containing 0.04% potassium azide. Purine nucleoside phosphorylase (1120 I.U.) and thymidine phosphorylase (10,000 I.U.) (Krenitsky, et al., Biochemistry, 20, 3615, 1981 and U.S. Pat. No. 4,381,344) immobilized on DEAE cellulose was added to the reaction and the suspension was stirred at 45° C. After 9 days, 140 ml MeOH was added to the reaction. The reaction was applied to a column containing AG1-X2 (OH-- form, 2.5×10 cm) and eluted with MeOH. Fractions containing product were pooled, concentrated, and flash chromatographed on silica gel (2.5×20 cm) with dichloromethane:acetone (9:1). Solvent was removed and lyophilization yielded 0.396 g of 9-(2,3-dideoxy-3-fluoro-β-D-erythro-pentofuranosyl)-6-morpholino-9H-purine (50%): mp 175°-178° C.; [α]D20 -20.2 (c=0.51, DMF); UV λmax (ε×10-3) at pH 7, 278 (21.4); at pH 13, 278 (21.1); 1H NMR (400 MHz, DMSO-d6) δ8.40 and 8.25 (2s, 2H, H2 and H8) 6.41 (dd, 1H, H1', H=9.3 Hz, J=5.7 Hz), 5.43 (dd, 1H, H3', J=53.6 Hz, J=4.4 Hz), 5.40 (m, 1H, OH5'), 4.10-4.30 (b, 5H, H4' and morpholino group), 3.60 (m, 2H, H5' and H5"), and 2.88-3.04 and 2.59-2.69 (m, 2H, H2' and H2" ; MS (ci) 324 (M+1), 304 (M-F), 206 (MH2 --C5H8FO2).

Workup

  1. additionwas added to the reaction
  2. additioncontaining AG1-X2 (OH-- form, 2.5×10 cm)
  3. washeluted with MeOH
  4. additionFractions containing product
  5. concentrationconcentrated
  6. customflash chromatographed on silica gel (2.5×20 cm) with dichloromethane:acetone (9:1)
  7. customSolvent was removed

Sources & evidence

ORD record
ord-bc117bf9ceef42a3bd0f9051b8740b91
Source dataset
uspto-grants-1997_09
Patent number
US05663154

Reaction notes

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